title: Psychometric properties of the Portuguese version of the Depressive Cognition Scale in Brazilian adults with diabetes mellitus.
abstract: Identifying depressive cognitions in Brazilians with diabetes can be important step to prevent the development of clinical depression, which is negatively associated with diabetes self-management. This study focused on the psychometric testing of the Portuguese version of the Depressive Cognition Scale, the Escala Cognitiva de Depressão (ECD), among 82 Brazilian adults with diabetes mellitus. The questionnaire was assessed for internal consistency, homogeneity, and construct validity using factor analysis and convergent validity assessment with the Portuguese version of the Beck Depression Inventory, the Inventário de Depressão Beck (IDB). Cronbach's alpha for the ECD was .88. The homogeneity of the instrument was supported by item-to-total correlations between .30 and .70. Factor extraction generated only one factor with eigenvalues greater than 1, which is consistent with the English version. The ECD's total score had a weak but significant correlation with the IDB's total score (r = .24, p < .05), indicating convergent validity. Evidence for the reliability and construct validity of the ECD was provided by this study. This scale has the potential to become a useful screening tool for depressive cognitions among Brazilians with diabetes.
authors.affiliation: University of Kansas School of Nursing, Kansas City, KS 66160, USA. vsousa@kumc.edu
authors.forename: Valmi D
authors.initials: VD
authors.lastname: Sousa
authors.forename: Maria L
authors.initials: ML
authors.lastname: Zanetti
authors.forename: Jaclene A
authors.initials: JA
authors.lastname: Zauszniewski
authors.forename: Isabel A C
authors.initials: IA
authors.lastname: Mendes
authors.forename: Michelle O
authors.initials: MO
authors.lastname: Daguano
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001294:Attitude to Health; D001938:Brazil / Q000453:epidemiology; D003071:Cognition; D003866:Depressive Disorder / Q000175:diagnosis* / Q000209:etiology / Q000517:prevention & control; D048909:Diabetes Complications / Q000150:complications* / Q000453:epidemiology / Q000523:psychology; D042241:Early Diagnosis; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods / Q000592:standards; D008875:Middle Aged; D009730:Nursing Assessment / Q000379:methods* / Q000592:standards; D015403:Nursing Evaluation Research; D015404:Nursing Methodology Research; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D011594:Psychometrics; D011795:Surveys and Questionnaires / Q000592:standards*; D014175:Translating